Driving mechanism



Mlch, 235,192.9.. E. B. ROBY 1,706,901

DRIVING MECHANISM Fired sept. 4, 19.26

5 Sheets-Sheet l` l EDWARD B.. ROBY.

BY mw A TTORNE Y IN VEN TOR Marc-|126, 1929. E. B.' may 1,106,991;

DRIVING 'MEGHANI SM Filed sept.4, 1926 s sheets-sheet 2 f INVENTOREDWARD B. ROBY.

E. B. ROBY 1,706,901

DRIVING MECHANISM Filed sept. 4, 1926 5 Sheets-Sheet 3 a IIIA INVENTOI?EDWARD B. ROBY A TTORIVEY Patented Mar. 26, V1929.

UNITED STATES PATENT OFFICE.

EDWARDS. ROBY, OF TROY, NEW YORK, ASSIGNOR TO S. AND FOLDNG MACHINECOMPANY, ING., OF `(It-BEEN ISLAND, NEWJYORK; A GORPORATIONOF NEW YORK.

nRivING MncHANisM;

Application filed September 4, 1926. Serial No. 133,544. i

The present invention broadly relates to a driving mechanism adapted .toimpart an 0s.- cillating or rotating motion toa lever ora crank and inparticularit relates to a mechanism of the type shown in my priorapplica-V tion, Serial No. 53,246, tiled August 29, 1925, in which themotion of the lever or crank, is controlled by manipulations of a footlever.

The invention deals with a driving mechanism for machines, whichincludes two rotate ing members continuously powei driven in oppositedirections, to which rotating members a lever or crank is adapted to beopera7 tively connected or disconnected by manipulations of a footleverunder the control of the operator of the machine. iJVlien the lever orcranli is operatively connected withone of the said rotating members itis caused tobe rotated Vin one direction, and when it is opera tivelyconnected with the other of said rotating members it is causedtoberotated in the opposite direction.

The object of the present invent-ion is to simplify and render moreeifective the meclianism. Briefly stated, the present invention consistsin the employment of a different, more simple and effective means forengaging the lever or the crank to the oppositely rotating members,whichvserve to drive it.

The invention will be more fully understood from a considerationof thefollowing description of the accompanying drawing forming a part-of thisspeciiicationand'in which Figure 1 shows in side elevation a part of. amachine provided with the driving:mecha` nism of the invention. i

Figure 2 isa plan sectional view through the center of the drivingmechanism.

Figure 3 is anenlarged elevationalvieiv partly in vsection of thedriving mechanism, f

Figure 4 is an enlarged view in elevation illustrating the means foroperatively eli-- orY disengaging the lever or c- 'ank tov be operatedto the eppositely rotating meni- Figures 7., 8 and 9 are viewsv similartoy Figure 4, but showing the `engaging means in differentposition.

rlnd Figure 10 is a` sectional view von the line 10e-10. of Fignre.. i i

Referring now to the drawings iii which like reference numerals indicatelike parts throughout the various views, the numeral, 10, indicates theframe of a machineequipped with the driving mechanism of the presentinvention. Motion is communicated to the op-` erating elements of themachine through a member, 11, in the nature of a connecting rod. Thismember is adapted to impart reciprocatingmotion to a piston 11a to whichit iscon-` iiectcdiby a pivot shaft 1lb, the piston being mounted formovement on a vertical rod, 12,V mounted in the frame of the machine andis also adapted to impart rocking motion to other parts of the machine(not shown). The

member, 11, is pivoted to a lever, 13, at 14,

and is actuated by said lever. The lever, 13, is mounted on a shaft, 15,which extends horilzontally through the machine and has a bearing 13which` also serves as a support for rod 12, as shown in Figure 1. Alever, 16,` is also pivoted to the lower part of the frame of themachine at 17 and has a foot piece, 1S,`

for the operator of the machine. When the foot of the operator is takenoff the foot piece, the lever, 13, assumes the vertical position shownin Figure 1, Vbut when the operator of the machine depresses the footpiece, 18, the lever, ,13, cis rotated counter-clockwise, as seen inFigure 1, through anangle of 180 and to a position diametricallyopposite to i that shown in Figure 1; As long as the operator of ,themachine keeps depressed the footfpiece 18,1t-he lever, 13 stays inthisfpcsitiombut as soonas he lets upon the foot piece, the lever,

13, swings back. through the same angle to its-origiiial positionsliownin Figure 1. The means whereby the above motion of the lever, 13, isobtained forms the subject,` matter of thepresent invention. y. i

Mounted on the shaft, 15, are two oppositely rotating members shown inthe form of an crdinarygear, 19, and an aunulargear, 20, which arearranged coneeiitrically and spaced apart. These gears arecontinuouslyrotated at a uniform speed in opposite directions as bymeans of; a small-pinion, 21, disposed be on the shaft, 15, is a crankarmf25, havingan elongated bearing, A26, encirclingasaid shaft. Theleiier, `13, isfrigidly securedto the `crank i arm,25, sovthatrotationof the latter produces` rotation of the former. The lever' 13and arm i are preferably of unitary construction and the two'in factform abell-crank lever pivoted on shaft 15. The crank arm is adapted tobe operatively connected with either the gear, 19, or the gear,20,sothat it `may be oscillatedback and forth' thereby to cause oseilla'tions ot the lever, 13.v The means wherebyv the crank arm is operativelyconnected to one or the other of the gears whentlie operator of the'machine manipulates the foot lever, 16,

' is= the main novel .feature of the present invention over `that shownin my prior application, Serial No. 53,246, tiled August 29, 1925,referred to above. n v l .Y

In orderto operatively connect the Vcrank arm, 25, to-the'gear, 19,011to the gear, 20, I

remploy an'e'sca'pement lever, 27, which is pivotednearthe end of thecrank arm, 25, meansof'a short shaft, 28.` The escapement lever has ashort arm, 29, best seen in Figure 3, .said` short arm having a bearing,30, for a' horizontal shaft, 31, which is provided with a tooth, 92,'disposed between the gears, 19 and y2,0. y'The shaft, 31, is looselymounted in the Y bearing, 30, and may oscillate therein. The

amount otoseillation, however, is limited by a pin, 33, best showninFgure 10, which extends transversely through the shaft, 30,

and into slots,34, `formed in the short bearing 30. These slots permitthe shaft to be 'oscillated through a certain angle. The

shaft, 31, isyieldingly maintained in the positionV shown in Figure lObymeans of a spring, 35, encircling the bearing, 30, which springtio-'operates with the pin, 33, to main? Y' tain it centrally disposedin the slots, 34, as

f as a pivot.

The ese'apement'lever is ycausedto be oscillated around the shat't28, asa pivot when the operator of the machine depresses the footV piece,'18,and -when so oscillated the escapement tooth, 32, is urged toengagement. with the annular gear, 20, in the manner shown in Figure7.'The escapementlever, the crank arm,=andy the lever, 13, areVconsequently ro-r tated counter-clockw1se as seen 1n Figure 3" by theannular gear, until the lever, 13, assumes a position diametricallyopposite that shown in Figure 1, at which position: the

i ese'apement lever kis rocked on its pivot, 28,

to'disengage the tooth, 32, from Lthe annular gear and to move lit back,into its neutral povsition 'ass'hownvimFigures 4 and 8. The

tooth will remain in the neutral position as long as the foot piece, 18,is kept lowered by the foot of the operator. As soon as the operatortakes his foot oli the toot piece, however, the escapement lever, 27, isrocked on its pivot, 28, in such a direction as to move the tooth, 32,into engagement with the gear, 19, as' shown in Figure 9. The escapementlever, the crank arm, and the lever, 13, are then moved back by thegear, 19, to the position shown in Figure 1, and when they have reachedthis position the escapement lever is rocked with respect to the crankarm in such manner as to disengage the tooth, 32, from the gear, 19,said tooth again assuming the neutral position where it will remainuntil the operator again depresses the foot piece.

On the shaft, 15, of the mechanism a gear, 37, is loosely mounted. Thisgear is of somewhat peculiar design and is best shown in Figure. 2.One-halt the gear has teeth extending entirely around its circumferenceand forms an ordinary pinion, the other half of the gear has only asingle tooth, 38, on its circum'lerence, the rest of the cireumferenceof this part ot the gear being in the torni ot f a smooth cylinder witha radius equal to the radius of the pitch line of the teeth. The singletooth, 38, `[its in a notch, 39, at the end of the escapement lever, 27,as will be seen from Figure 3. lVhen the tooth, 38, is in the notch onthe lever the escapement tooth, 32, is in the neutral position shown inFigure 4t. yThe end of the lever, 27, is also formed with two curvedportions, 40 and 41, which have radii equal to that oit the pitch lineot the escapement gear, 37, but the centers ot the curves are oii'settom the center of the gear. The'escapement gear, 37, is adapted to berotated through an angle ot 180O so that the tooth, 38, will assume aposition diametri 'ally opposite to that shown in Figure 3, whichposition of the tooth is shown in Figure 6. The rotation of the gear iscaused by the operator of the machine through the 'foot lever, 16.

The teeth o1E the gear, 37, which extend entirely around itscircumference mesh witl the teeth of a gear segment, 42, which ismounted on a horizontal shait, 43. The gear segment is adapted to beoscillated by the toot lever,1(i, through a link, L14, one end oi whichis' pivoted to the lever, 1G, at 45, the other end of which pivoted tothe gear .segment at 16. rfhe 'toot piece, 18, is biased to its`elevated position shown in Figure 1 by means` of a coil spring, 17. Inthis position the gear segment, Ll2, has rotated the pinion, 37.y intothe position shown in Figure 3, at which position the eseapement tooth,32, is in the nentral position shown in Figure at and the lever, 13, isin the vertical position shown in Figure 1.

In the operation and use of the above meehanism, when the operator ofthe machine steps fit) on the 'loot piece, 1S,the gear segment, 4 2,immediately rotates the escapement gear, 37, through an angle 01""180Oto the position shown in Figure 6. rlhe tooth, 38, on the es* capementgea rocks the escapement lever, 27, clockwise, as seen in Figure 3,around the pivot, 28, and the curved surface, Ll1, ot the lever bearsagainst the cylindrical part ont the gear. This rocking of theescapoment lever causes the oscapement tooth, 32, to engage with theteeth of the annular gear, 9.0, so that the escapement lever, the crankarm., and the lever, 13, are rotated as a unit counterclockwise aroundthe shat't, 15. As it rotates, the curved portion, 11, of the escapementlever slides over the cylindrical part of the eseapement gear, 37, andis thus maintained in a lixed angular position with respect to the crankarm so that the tooth, 32, is held in engagement with the annular wheel,20. `When, however, a rot-ation ot 18()O has obtained, the notch, 39, inthe escapement lever strikes the tooth, as indicated by the linesinFigure so that the escapement lever, 27, is rocked back on its pivot,Q8, to disengage the tooth, 232, from the annular wheel as indicated inFigure t3 and to move the tooth to its neutral position. The rotatingparts, that is, the escapement lever, the crank arm, and the lever, 13,new come to rest in the position shownV in dotted lines in Figure G andwill remain iin that' position as long as the operator of the machinekeeps the toot piece, 18, depressed. lli'hen, however, the operator letsup on the foot piece, the spring, 47, urges the toot lever, 16, in suchmanner as to rotate the gear segment -i-Q, counterclockwise, as seen inFigure 6, and to littV the l'oot piece, 18, to its elevated positionshown in Figure 1. l/Jhen the gear s' ment is thus rotated, theescapement gear, 3T, is rotated back from the position shown in Figureto the position shown in Figure 3, and when thus rotated the tooth, 38,rocks the escaplmentlev 1r, 27, around the pivot, 28, so as to cause thecurved portion, ett), of the lever to bear against the cylindricalportion ot the escapement gear and to urge the tooth, 32, intoengagement with the rotating gear, 15), in the manner shown in Figure 9.r1`lie gear, 19, consequently, rota-tes the escapement lever, the crankarm, and the lever, 13, as a unit bach to their original positions shownin Figures 1 and lVhen the escapement lever has reached this posit-ion,the notch, 539, at its end strikes the tooth. 238, causingr said loverto be rocked around the pivot, 28, to disengage the tooth, 82, from enement with the gear, 19, and to move it to its neutral position where itwill remain the 'loot lever is again depressed. The rotating partsconsequently come to a stop in their original position, shown in Figures1 and 3. In order to insure an accurate functioning ot the mechanism,spring bumpers, a8, may, if desired, be employed, which will stop themotion ol the parts at the exa-ct position desired and will absorb theshock due to the sudden stopping ot the moving parts.

The spring, 35, which encircles the bearing', 30, insures a quick andrapid disengagement:- ot the escapement tooth from the gears and returnto neutral. position when the lever, 27, is rocked on its pivot in themanner above described. The spring also serves to retain the tooth inits neutral position and prevents it from engaging in the teeth ot thegears, 19 and 20, except when theescapement lever is rocked on itspivot, 28. The spring pressed ball, 36, insures the accurate positioningolf the escapement lever with respect to the crank arm so that at thepositions ol rest these elements bear a fixed relation to one another.The engagement ol the crank arm and the escapement through the springpressed ball, however, is purely a trictional one which docs not preventthe rocking oi the escapement lever about the shatt, 28, as abovedescribed.

Many variations and alterations may be made in the mechanismspecifically described above and l desire, therefore, to ho limited onlyby the state ot" theprior art and the scopo ofthe appended claims. i

claim: Y

1. A driving mechanism comprising rotary members continuouslypower-driven in opposite directions and concentrically disposed inspaced relation, a crank arm, a lever pivotedto said crank arm, meansassociated with the lever for engaging with either ot the rotarymembers, and means tor rocking the lever on its pivot.`

Q. A driving mechanism comprisinga rotary member continuouslypower-driven, a cranlr arm, a lever pivoted to said crank arm, meansassociated with the lever for engaging with the rotary member and meanstor rocking the lever on its pivot to cause engagement ot said leverwith the rotary member whereby the lever and the crank arm are driven bythe rotary member and to cause disengagement ot said lever from therotary member after a 'n'edetermined amountof rotation of the latterwhereby the lever and the crank arm come to rest.

3. A driving mechanism comprising a shaft, a rotary member continuouslypower-- driven disposed on said shatt, a crank arm on the shalt, a leverpivoted to said crank arm, the end of the lever having'` a notch and aconcave curved portion, means associw ated with the lever for engagingwith the rotary member, a reciting member for the lever mounted on theshaft, said rocking member having a tooth adapted to engage in the notchoi the lever and a convex curved portion with a radius substantiallyequal to that of the concave curved portion of the lever, and means torimparting` a rotary motion to said rocking member.

t. A. driving mechanism comprising a l cally disposed in spacelrelationon said shaft,

shaft, rotary members continuously power- Ydriven in opposite directionsand concentricallyv disposed in spaced relation on said shaft, the outerof said members having an inward engaging face and the inner of saidAmembers having'an outward engaging` face,

aV crank arm on the shaft, a lever pivoted to saidA crank arm, a vtoothassociated with the `leverandA disposed between the rotary members,.andmeans for rocking` the lever on its Jivot. i Y I "5. A, drivinglmechanism comprising a shaft, rotary members continuously power drivenin opposite directions and concentrioally disposed in spaced relation onsaid shaft, the outer of said members having an invvard engaging` aceand the inner ot said members having an outward engaging face, a crankarm onthe shaft', a lever pivoted to the cranli arm,l said lever having`a longv arm and a shortL a C ank arm on the shaft a lever pivotcd tosaid crank arm, means associated with the lever for engaging` witheither ot the rotating members, means tor maintainingY said lever insuch position with respect to the crank arm that the engaging' means isin its neutral position and out ot engagement with hoth rotary members,and means Ytor rockingsaid le ver on its pivot.

7. A driving mechanism comprising a shaft, rotary members continuouslypowerdriven in opposite directions and concentrically disposed in spacedrelation on said shaft, a crank :crm on the shaft, a lever pivotcd tosaid crank arm, the end ol the lever having concave curved portions otlike radii and a notch centrally disposed between said curved portions,means associated with the lever tor engaging with either of the rotarymembers, a roc ring member for the lever mounted on the sl1att;saidrocking member having! a tooth adapted to engage in the notch of thelever and a convex curved portion with a radins substantially equal tothe radii of the concave curved portions oi the lover, and meanstoiimpartinga. rotary motion to said roching member.

In testimony whereof, I have signed my name to this specification this30th day ot August, 1926.

EDVARD B. O'BY.

